[PSUBS-MAILIST] pressure test
JimToddPsub at aol.com
JimToddPsub at aol.com
Wed Oct 23 10:16:14 EDT 2013
Joe,
The cost of pressure testing has as much to do with multi-point measuring
and analysis of distortion as it does with just seeing if the vessel can
survive a given depth intact. There is a depth [above crush depth] at which
the vessel undergoes enough stress that one cycle or repeated cycles can
compromise the vessel even though it might not appear to have suffered.
Vance and others can speak a lot more to that than I can.
Jim
In a message dated 10/23/2013 8:46:44 A.M. Central Daylight Time,
josephperkel at yahoo.com writes:
Wow that's a bit rough for a working man! So much for that.
I must say though, that I don't like much the lower the sub to the bottom
and hope it comes back method of deep testing.
Joe
Sent from Yahoo! Mail for iPad
____________________________________
From: Alec Smyth <alecsmyth at gmail.com>;
To: Personal Submersibles General Discussion
<personal_submersibles at psubs.org>;
Subject: Re: [PSUBS-MAILIST] pressure test
Sent: Wed, Oct 23, 2013 12:52:33 PM
Hi Hank,
I asked at Carderock over a decade ago and was told the cost would depend
on setup time, which varies depending on how much instrumentation you want
during the test, but that a typical figure was around $27K. Waaaay beyond
my budget. Dale Heinzing tested Snoopy somewhere on the West side of Canada
at a lumber yard. Snoopy went in the tank alongside the lumber and must
have been pretty well disinfected, but the scary bit was that they released
the pressure almost instantaneously, with a bang. That test was to only 400'
so not really sufficient for a Nekton, but it might still be of interest
since I think it's relatively close to you and probably was inexpensive.
Best,
Alec
On Wed, Oct 23, 2013 at 8:33 AM, Joe Perkel <_josephperkel at yahoo.com_
(javascript:return) > wrote:
Hank,
There are two in the states however, the one on the west coast has a 72"
limit if I recall correctly.
The other on the east coast, is the same one used for the k-600 and Alvin.
A contract and waiver are required, let us know the cost if you do it.
Go to the WHOI website for info
Joe
From: hank pronk <_hanker_20032000 at yahoo.ca_ (javascript:return) >
To: Personal Submersibles General Discussion
<_personal_submersibles at psubs.org_ (javascript:return) >
Sent: Wednesday, October 23, 2013 8:10 AM
Subject: Re: [PSUBS-MAILIST] pressure test
Does anyone know if the is a pressure chamber large enough to test my
Nekton submarine in the Pacific North West.
Hank
From: Phil Nuytten <_phil at philnuytten.com_ (javascript:return) >
To: Personal Submersibles General Discussion
<_personal_submersibles at psubs.org_ (javascript:return) >
Sent: Tuesday, October 15, 2013 10:19:38 PM
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Hi, Hugh
As Vance says, HY80 is somewhat challenging to weld – err, actually, that’
s an understatement. We had to work with our fabricators to come up with a
whole weld procedure to satisfy our classing agency. If you decide to go
this route, let me know and we will share that procedure.
Phil
From: _vbra676539 at aol.com_ (javascript:return)
Sent: Tuesday, October 22, 2013 7:18 PM
To: _personal_submersibles at psubs.org_ (javascript:return)
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
I think it is somewhat demanding to weld, and expensive by comparison, of
course. That said, there is a mountain of data available, as the pressure
hulls of most modern US Navy submarines are built out of it.
Vance
-----Original Message-----
From: Hugh Fulton <_hc.fulton at gmail.com_ (javascript:return) >
To: 'Personal Submersibles General Discussion'
<_personal_submersibles at psubs.org_ (javascript:return) >
Sent: Tue, Oct 22, 2013 10:15 pm
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Vance, Yep that sounds about right.
Are there any nasties to using it?
Chs Hugh
From: Personal_Submersibles
[_mailto:personal_submersibles-bounces at psubs.org?_ (javascript:return) ] On Behalf Of Vance Bradley
Sent: Wednesday, 23 October 2013 1:37 p.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Hugh,
HY-80 used to maintain the standard dimensions of a DW2000 with 50% depth
increase.
Vance
Sent from my iPhone
On Oct 22, 2013, at 8:13 PM, "Hugh Fulton" <_hc.fulton at gmail.com_
(javascript:return) > wrote:
Vance, I am sure I saw recently from Phil that he was using HY 80 but I
don’t know what on. I did a calc on mine and I got a lot deeper using the
HY 80 specs over the Grade 70.
Hugh
From: Personal_Submersibles
[_mailto:personal_submersibles-bounces at psubs.org_ (javascript:return) ] On Behalf Of _vbra676539 at aol.com_
(javascript:return)
Sent: Wednesday, 23 October 2013 11:55 a.m.
To: _personal_submersibles at psubs.org_ (javascript:return)
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
One other thing comes to mind on this. Phil uses A516Gr70 in the DW2000s.
It occurs to me that if there was a demonstrable benefit to A537, he would
have used taken advantage of it. And he didn't, apparently. Interesting.
Don't know why, though. Maybe it has something to do with welding stainless
inserts in and the heat treatment thereof. Just a guess.
Vance
-----Original Message-----
From: JimToddPsub <_JimToddPsub at aol.com_ (javascript:return) >
To: personal_submersibles <_personal_submersibles at psubs.org_
(javascript:return) >
Sent: Tue, Oct 22, 2013 6:42 pm
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Vance,
>From Leeco Steel's website:
A537 plate steel is heat-treated. As a result, it displays greater yield
and tensile strength than the more standard A516 grades. A537 steel plate is
ideal for both in boilers and pressure vessels, and is used in the oil,
gas and petrochemical industry.
Nice to see it provides at least a brief comparison to A516. I'm sure
there are more variables to consider including cost.
Jim
In a message dated 10/22/2013 5:23:43 P.M. Central Daylight Time,
_vbra676539 at aol.com_ (javascript:return) writes:
Jim,
A537 was used extensively, as well, especially in the early boats that
Perry built. Maybe you can figure it out. It seems that I recall being told
that it was somewhat harder to weld but had better cold-water-under-pressure
properties. Maybe Dr. Nuytten would weigh in on this, assuming he isn't up
to his ass in DW3000 alligators this week (which I suspect he is).
Vance
-----Original Message-----
From: JimToddPsub <_JimToddPsub at aol.com_ (javascript:return) >
To: personal_submersibles <_personal_submersibles at psubs.org_
(javascript:return) >
Sent: Tue, Oct 22, 2013 4:18 pm
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Greg,
I should have clarified that. It was a cut-and-paste from a web site.
I'm more of a librarian in that I save info in an organized fashion when I
come across it so I'll have it available later when the need arises. That
was the case in this instance.
Jim
In a message dated 10/22/2013 1:25:34 P.M. Central Daylight Time,
_jgcottrell2002 at yahoo.com_ (javascript:return) writes:
Thanks for the info, Jim. It's good to know there is some one in the group
that is also in the steel industry.
Greg
From: "_JimToddPsub at aol.com_ (javascript:return) " <_JimToddPsub at aol.com_
(javascript:return) >
To: _personal_submersibles at psubs.org_ (javascript:return)
Sent: Tuesday, October 22, 2013 12:59 PM
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
Maybe more detail than you really want to know, but here goes:
ASTM A 516 or ASME SA 516 grade is one of the most popular steel grades in
market .
It is primarily intended for use in welded pressure vessels where notch
toughness is important. It comes in four grades 55, 60, 65 & 70. At Oakley
Steel we mainly sell 516 gr 60 and 516 gr 70. These grades cover a range of
tensile strengths from 55 - 90 MPa and this versatility explains much of
the specifications popularity.
For plates thinner than 40mm we normally supply them as rolled. Plates
supplied above 40mm thick are normalised.
For A 516 grade 70, which is one of our most popular steels, the ASME
standard composition is as follows (dependent on grade):
Carbon 0.27 - 0.31%
Manganese 0.79 - 1.3%
Phosphorous 0.035% max
Sulphur 0.035% max
Silicon 0.13 - 0.45%
In a message dated 10/22/2013 11:53:12 A.M. Central Daylight Time,
_jonw at psubs.org_ (javascript:return) writes:
Generally, A516gr70 suffices for personal or recreational submarines.
Jon
On 10/22/2013 12:45 PM, Christopher Cave wrote:
Hello,
What is the best steel to use for a submarine hull. Someone mentioned
marine steel such as 316,316L or 317. Any suggestions or a website I can
review.
Thanks,
Chris
Christopher Cave
_christophercave at yahoo.com_ (javascript:return)
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 8951 (20131022) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com/
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 8952 (20131022) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com/
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 8952 (20131022) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com/
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 8952 (20131022) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com/
_______________________________________________ Personal_Submersibles
mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
_Personal_Submersibles at psubs.org_ (javascript:return)
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20131023/cba380a1/attachment-0001.html>
More information about the Personal_Submersibles
mailing list